- Disconnect all drives except for the one where you want to install Win 7.
- Wipe the hard disk clean using diskpart.
- Install win 7.
now here's how to wipe that hard disk clean using your Win 7 DVD.
1. boot up your Win 7 DVD
2. at the very first dialog, hit SHIFT + F!0 key combo.
that will get you to a command prompt, that looks like this:
now enter these commands: USE THE DISKPART PROGRAM TO “CLEAN” THE HARD DISK
Type the commands shown, hitting the Enter key after each.
Do not proceed to the next command until the current command is finished. · DISKPART
(the command prompt will change to DISKPART>) · LIST DISK
(this will list the disks present) · SELECT DISK 0
(assuming disk zero is the desired hard disk) · DETAIL DISK
(this will show you info regarding the disk you selected) · CLEAN ALL
(this is the command to write zeros to entire disk)
This can take half a day for a 2 Terabyte disk. · EXIT
(this will exit you from the DiskPart program) · EXIT
(this will exit you back to the Windows 7 install program)